地面兵装板块9月17日跌0.3%，北方长龙领跌，主力资金净流出3.87亿元

Market Overview - The ground equipment sector experienced a decline of 0.3% on September 17, with North China Long Dragon leading the drop [1] - The Shanghai Composite Index closed at 3876.34, up 0.37%, while the Shenzhen Component Index closed at 13215.46, up 1.16% [1] Stock Performance - Notable stock performances include: - Tianzuo Equipment (300922) closed at 24.58, up 1.57% with a trading volume of 59,400 shares and a turnover of 146 million yuan [1] - ST Emergency (300527) closed at 8.60, up 1.42% with a trading volume of 298,800 shares and a turnover of 260 million yuan [1] - North China Long Dragon (301357) closed at 126.98, down 1.60% with a trading volume of 49,300 shares and a turnover of 626 million yuan [2] Capital Flow - The ground equipment sector saw a net outflow of 387 million yuan from institutional investors, while retail investors had a net inflow of 363 million yuan [2] - The capital flow for individual stocks shows: - Inner Mongolia First Machinery (600967) had a net inflow of 58.89 million yuan from institutional investors [3] - North China Navigation (600435) experienced a net outflow of 49.26 million yuan from institutional investors [3] - Galaxy Electronics (002519) had a significant net outflow of 15.13 million yuan from institutional investors [3]